Nut-lock



ALBERT J. ll/IAUERMANN, OF DEL RIO, TEXAS.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 516,501, dated March13, 1894.

Application filed July 31,1893. Serial No. 482,011. (No model.)

Improvements in Nut-Locks; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and.

to the letters of reference marked thereon, wh1ch forn1 a part of thisspecification.

My invention relates to an improvement in that class of nut locks inwhich a locking washer is employed, and arranged at the base of the nut,and adapted to bear upon the under side of the same, whereby it isprevented from unscrewing and my object is to provide a lock of thisgeneral class wherein the washer will bear upon both the washer and thebolt, thereby making a more effective and desirable device than anyheretofore known.

To this end my invention consists in certain improved features-0fconstruction which will now be fully described and finally embodied inthe claims.

Iteferring to the accompanying drawings whlch illustrate my invention,Figure 1 represents a sectional view, taken longitudinally through therail, of my device in use; Fig. 2 aperspective view of the lockdetached; Fig. 3 a plan and Figs. 4 and 5 various sectional views ofdetails. 7

The reference letter a, indicates the bolt to which my device is hereshown as applied, b,

the nut and c the fish plate of the rail joint all of which may be ofany preferred form.

61, indicates the nut lock which is formed of abar of steel, square incross section and bent so as to form substantially a ring, the ends fand g of which lie, normally, one above the other and a short distancefrom each other, as shown in Fig. 42. Each end of the bar is formed withan oblique face 6, disposed parallel with each other so that when theends are pressed together, against their normal tendency, their obliquefaces will lie flush with each other. This construction gives to eachend of the bar a triangular shape in cross section, (see Fig.

4.) Formed in the upper side of the end f,is an upwardly extendinggripping point 9 which is adapted to engage and hold the nut and is soformed that when the-nut is turned to the right it will not positivelyengage with it, but when the direction of the nut is re-- versed thepoint will firmly grip the nut and prevent it from being retracted. Thisis accomplished by means of an inclineportion h, to

the right of the point, which causes the point f, to be pushed down, asthe nut is turned over it; and the abrupt face 'i, to the left of thepoint, which gives the latter a hold on the nut.

The end e, of the ring has its'upper inner face bent inwardly toward thecenter of the ring whereby the gripping point It is formed, (see Fig.3.)

In using my improved nutlock the ring is first placed over the bolt andthe nutis screwed down over it. This will operate to overcome thenormaltendency of the ends of the ring and compress them together, whereuponthe point 9 will firmly grip the under side of the nut and the inclineface on the point fwill operate with the incline faced point e, to pushthe gripping point or edge It toward the center of the ring andfirmlyinto the bolt. This operation is shown in Fig. 1. Thus it will beseen that a not lock is provided in which two gripping points or edgesare employed and one made to operate with the bolt while the otheroperates with the nut. By this means a much more effective and durablenut lock is produced.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is-

1. A nut lock adapted to encircle the'bolt and to be arranged betweenthe base of the nut and the part bolted, and formed of a bar of springmetal bent in the formof a circle the ends of which bar are arranged oneabove another and having substantially parallel oblique engaging faceswhereby when the upper end is pressed down upon the lower end the saidlower end will be forced to move laterally and inwardly, and twogripping points or edges one on thetop of the upper end and adapted toengage and hold the'nut and the other on the inner side of the lower endand 10 nut, and an inwardly extending gripping edge located upon theremaining overlapping end and adapted to engage the bolt, substantiallyas described.

In testimony whereof I affix my signature in presence of two Witnesses.

ALBERT J. MAUERMANN.

\Vitnesses:

G. B. ABERCROMBIE, G. ST. 0. HUssnY, Jr.

